117537444 has 18 divisors (see below), whose sum is σ = 297108630. Its totient is φ = 39179136.

The previous prime is 117537443. The next prime is 117537449. The reversal of 117537444 is 444735711.

117537444 is a `hidden beast` number, since 117 + 537 + 4 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 83174400 + 34363044 = 9120^2 + 5862^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3264929 = 117537444 / (1 + 1 + 7 + 5 + 3 + 7 + 4 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 117537399 and 117537408.

It is not an unprimeable number, because it can be changed into a prime (117537443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1632429 + ... + 1632500.

It is an arithmetic number, because the mean of its divisors is an integer number (16506035).

Almost surely, 2^117537444 is an apocalyptic number.

It is an amenable number.

117537444 is an abundant number, since it is smaller than the sum of its proper divisors (179571186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117537444 is a wasteful number, since it uses less digits than its factorization.

117537444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264939 (or 3264934 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 117537444 is about 10841.4687196892. The cubic root of 117537444 is about 489.8450766651.

The spelling of 117537444 in words is "one hundred seventeen million, five hundred thirty-seven thousand, four hundred forty-four".